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Re:APFS changes in Big Sur: how Time Machine backs up to APFS by ksec on Tuesday September 29, 2020 @07:32AM (#24626386)
I think this needs to be made to HN front page or viral on twitter.

Along with iPhone iTunes Backup Corruption issues which is still not fixed. But it is hard to provide any evidence other than personal experience.

Re:APFS changes in Big Sur: how Time Machine backs up to APFS by DavidSJ on Tuesday September 29, 2020 @07:55AM (#24626566)